Interesting settings Sam,
I'm curious about this one:
"-XX:MaxTenuringThreshold=0" ; Makes the full NewSize available to every
NewGC
; cycle, and reduces the pause time by not
; evaluating tenured objects. Technically,
this
; setting promotes all live objects to the
older
; generation, rather than copying them.
That setting forces all new objects that survive a young scavenge to be
promoted to the old generation. Effectively switching off generational GC,
which is one of the main optimisations in performance GC memory management.
Since GC on the old generation is generally more expensive pause-wise, how
do you prevent that from becoming a problem ?
On Tuesday, July 3, 2012 12:58:19 PM UTC+2, Sam Aaron wrote:
>
> Hi Bruce,
>
> at the bottom of this file you can see the options we use in Overtone to
> try and reduce latency (i.e. we're not so worried about throughput, but are
> trying to minimise the occurrence of long GC pauses)
>
> https://github.com/overtone/overtone/blob/master/project.clj
>
> Sam
>
> ---
> http://sam.aaron.name
>
> On 1 Jul 2012, at 23:19, Bruce Durling wrote:
>
> > Clojurians,
> >
> > Interesting post here on different GC settings for Java 7. Does anyone
> > have any tips/experience about what settings have worked best for them
> > with clojure and under what circumstances?
> >
> > http://www.fasterj.com/articles/oraclecollectors1.shtml
> >
> > cheers,
> > Bruce
> >
> > --
> > @otfrom | CTO & co-founder @MastodonC | mastodonc.com
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